
Helena Mattsson
Biography
Helena Mattsson (born 30 March 1984) is a Swedish actress living and working in Hollywood.
Mattsson was born and raised in Stockholm, Sweden, had roles early on in Wild Side Story and other cabarets there, and moved at a young age to London, England, to attend theatre school. When she was 19 years old she moved to Hollywood. Her first role was in a short-lived TV series called Sweden, Ohio in 2004. In 2007 she starred in Species: The Awakening, and has been cast in the film You and I. Mattsson also appeared in the music video of Primal Scream's "Country Girl" in 2006. She appeared in the Touchstone Pictures film Surrogates and also in three episodes of the ABC series Desperate Housewives as Irina and in three episodes of Nikita as Cassandra Ovechkin. She played Alexis Blume in the TV series 666 Park Avenue.
Known For

TV
The Rookie
Ashley McGrady
2018

TV
The Mentalist
Elsa Struven
2008

TV
CSI: Crime Scene Investigation
Rebecca 'Becca' Mayford
2000

TV
Desperate Housewives
Irina Kosokov
2004

TV
CSI: Miami
Juliana Ravez
2002

TV
Two and a Half Men
Ingrid
2003

TV
Fargo
Jemma Stalone
2014

TV
NCIS: Los Angeles
Johanna
2009

TV
American Horror Story
Agnetha
2011

TV
Cold Case
Kateryna Yechenko
2003

TV
CSI: NY
Lauren Redgrave
2004

TV
Magnum P.I.
Megan McGrady
2018

TV
Workaholics
Eve
2011

TV
Nikita
Cassandra Ovechkin
2010

Film
Iron Man 2
Rebecca
2010

TV
Rules of Engagement
Martina
2007

TV
The Defenders
Tawney
2010

TV
Legend of the Seeker
Salindra
2008

TV
Tacoma FD
Ulsa
2019

TV
Kitchen Confidential
Beautiful Blonde
2005
Filmography
2025FilmBull Runas Elizabeth Chandler2025FilmLittle Angelsas Charli2024TVTwilight of the Godsas Angboda (voice)2024FilmSinister Surgeonas Dr. Nichols2023FilmINT. HALLWAY / NIGHTas Janet2023FilmDark Assetas Jane2021FilmSomething About Heras Jackie2020FilmIceland is Bestas Carla2020FilmMurder in the Vineyardas Emma Kirk2020FilmShattered Memoriesas Kelly Moore2019FilmHis Deadly Affairas Danielle Turner2019TVTacoma FDas Ulsa2018FilmMommy Group Murderas Grace2018FilmMy Dinner with Hervéas Britt Ekland2018TVThe Rookieas Ashley McGrady2018TVMagnum P.I.as Megan McGrady2018FilmMy Husband's Secret Wifeas Avery2018FilmMelvin Smartyas Sylvia2018FilmThe Neighborhood Nightmareas Kat Riley2017FilmSmartassas Henna2017FilmRxas Jennifer2017TVJeff and Some Aliensas Inga2016FilmCode of Honoras Keri Green2016FilmThe Loneras Oksana2015FilmWin, Lose or Loveas Clara Goodwin2014TVFargoas Jemma Stalone2014FilmAudreyas Tess2013TVBetrayalas Brandy Korskaya2012FilmSeven Psychopathsas Blonde Lady2012TV666 Park Avenueas Alexis Blume2012FilmGuns, Girls and Gamblingas The Blonde2012FilmShe Was Hereas Hilary Harris2012FilmThe Babymakersas Tanya2011TVAmerican Horror Storyas Agnetha2011TVWorkaholicsas Eve2011TVBreakout Kingsas Heather Storrow2011FilmYou and Ias Kira2010TVThe Defendersas Tawney2010TVNikitaas Cassandra Ovechkin2010FilmBehind the Moominsas Self2010FilmIron Man 2as Rebecca2009FilmSurrogatesas JJ the Blonde2009TVNCIS: Los Angelesas Johanna2009FilmNobodyas Lelle2008TVLegend of the Seekeras Salindra2008TVThe Mentalistas Elsa Struven2007FilmSpecies: The Awakeningas Miranda Hollander2007TVRules of Engagementas Martina2005TVKitchen Confidentialas Beautiful Blonde2004TVDesperate Housewivesas Irina Kosokov2004TVCSI: NYas Lauren Redgrave2003TVCold Caseas Kateryna Yechenko2003TVTwo and a Half Menas Ingrid2002TVCSI: Miamias Juliana Ravez2000TVCSI: Crime Scene Investigationas Rebecca 'Becca' Mayford—FilmVanity—FilmReunion—TVAmerican Menas Anya